First-Class Mail & Postage

First-Class Mail is a fast, low-cost way to send envelopes and postcards. See First-Class Mail and Forever stamp prices for a letter and postcard.

I sell jewelry and have always mailed with USPS first class. I got this mail returned to me today and have no idea what went wrong. I never had an issue before.

How reliable is first class mail? I sent my cousin her passport (greencard) back on first class mail because the person at the desk said it's the time same as priority and

What is the difference between First-Class Mail and regular mail?

First-Class Mail & Postage, USPS

Postage Rate Chart - Production Solutions

How reliable is first class mail? I sent my cousin her passport (greencard) back on first class mail because the person at the desk said it's the time same as priority and

USPS First-Class Forever Stamp, 100-count

International Mail Services & Shipping Rates

First Class Mail Stamp

When to Use First-Class Mail vs. Priority Mail

USPS Mailing Guidelines for First Class Mail - Letters, Postcards, Envelopes & Packages - MITO Studios

Frequently Asked Questions

USPS First Class Mail Service

How to get all of my postage stamps for free - Quora

What is the difference between first class mail and regular mail? - Quora